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+/*!
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+ * jQuery Mousewheel 3.1.13
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+ *
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+ * Copyright jQuery Foundation and other contributors
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+ * Released under the MIT license
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+ * http://jquery.org/license
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+ */
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+
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+(function (factory) {
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+ if ( typeof define === 'function' && define.amd ) {
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+ // AMD. Register as an anonymous module.
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+ define(['jquery'], factory);
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+ } else if (typeof exports === 'object') {
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+ // Node/CommonJS style for Browserify
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+ module.exports = factory;
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+ } else {
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+ // Browser globals
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+ factory(jQuery);
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+ }
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+}(function ($) {
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+
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+ var toFix = ['wheel', 'mousewheel', 'DOMMouseScroll', 'MozMousePixelScroll'],
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+ toBind = ( 'onwheel' in document || document.documentMode >= 9 ) ?
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+ ['wheel'] : ['mousewheel', 'DomMouseScroll', 'MozMousePixelScroll'],
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+ slice = Array.prototype.slice,
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+ nullLowestDeltaTimeout, lowestDelta;
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+
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+ if ( $.event.fixHooks ) {
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+ for ( var i = toFix.length; i; ) {
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+ $.event.fixHooks[ toFix[--i] ] = $.event.mouseHooks;
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+ }
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+ }
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+
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+ var special = $.event.special.mousewheel = {
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+ version: '3.1.12',
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+
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+ setup: function() {
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+ if ( this.addEventListener ) {
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+ for ( var i = toBind.length; i; ) {
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+ this.addEventListener( toBind[--i], handler, false );
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+ }
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+ } else {
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+ this.onmousewheel = handler;
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+ }
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+ // Store the line height and page height for this particular element
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+ $.data(this, 'mousewheel-line-height', special.getLineHeight(this));
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+ $.data(this, 'mousewheel-page-height', special.getPageHeight(this));
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+ },
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+
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+ teardown: function() {
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+ if ( this.removeEventListener ) {
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+ for ( var i = toBind.length; i; ) {
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+ this.removeEventListener( toBind[--i], handler, false );
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+ }
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+ } else {
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+ this.onmousewheel = null;
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+ }
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+ // Clean up the data we added to the element
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+ $.removeData(this, 'mousewheel-line-height');
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+ $.removeData(this, 'mousewheel-page-height');
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+ },
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+
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+ getLineHeight: function(elem) {
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+ var $elem = $(elem),
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+ $parent = $elem['offsetParent' in $.fn ? 'offsetParent' : 'parent']();
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+ if (!$parent.length) {
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+ $parent = $('body');
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+ }
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+ return parseInt($parent.css('fontSize'), 10) || parseInt($elem.css('fontSize'), 10) || 16;
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+ },
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+
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+ getPageHeight: function(elem) {
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+ return $(elem).height();
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+ },
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+
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+ settings: {
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+ adjustOldDeltas: true, // see shouldAdjustOldDeltas() below
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+ normalizeOffset: true // calls getBoundingClientRect for each event
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+ }
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+ };
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+
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+ $.fn.extend({
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+ mousewheel: function(fn) {
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+ return fn ? this.bind('mousewheel', fn) : this.trigger('mousewheel');
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+ },
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+
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+ unmousewheel: function(fn) {
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+ return this.unbind('mousewheel', fn);
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+ }
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+ });
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+
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+
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+ function handler(event) {
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+ var orgEvent = event || window.event,
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+ args = slice.call(arguments, 1),
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+ delta = 0,
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+ deltaX = 0,
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+ deltaY = 0,
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+ absDelta = 0,
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+ offsetX = 0,
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+ offsetY = 0;
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+ event = $.event.fix(orgEvent);
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+ event.type = 'mousewheel';
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+
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+ // Old school scrollwheel delta
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+ if ( 'detail' in orgEvent ) { deltaY = orgEvent.detail * -1; }
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+ if ( 'wheelDelta' in orgEvent ) { deltaY = orgEvent.wheelDelta; }
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+ if ( 'wheelDeltaY' in orgEvent ) { deltaY = orgEvent.wheelDeltaY; }
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+ if ( 'wheelDeltaX' in orgEvent ) { deltaX = orgEvent.wheelDeltaX * -1; }
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+
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+ // Firefox < 17 horizontal scrolling related to DOMMouseScroll event
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+ if ( 'axis' in orgEvent && orgEvent.axis === orgEvent.HORIZONTAL_AXIS ) {
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+ deltaX = deltaY * -1;
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+ deltaY = 0;
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+ }
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+
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+ // Set delta to be deltaY or deltaX if deltaY is 0 for backwards compatabilitiy
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+ delta = deltaY === 0 ? deltaX : deltaY;
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+
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+ // New school wheel delta (wheel event)
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+ if ( 'deltaY' in orgEvent ) {
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+ deltaY = orgEvent.deltaY * -1;
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+ delta = deltaY;
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+ }
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+ if ( 'deltaX' in orgEvent ) {
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+ deltaX = orgEvent.deltaX;
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+ if ( deltaY === 0 ) { delta = deltaX * -1; }
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+ }
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+
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+ // No change actually happened, no reason to go any further
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+ if ( deltaY === 0 && deltaX === 0 ) { return; }
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+
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+ // Need to convert lines and pages to pixels if we aren't already in pixels
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+ // There are three delta modes:
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+ // * deltaMode 0 is by pixels, nothing to do
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+ // * deltaMode 1 is by lines
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+ // * deltaMode 2 is by pages
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+ if ( orgEvent.deltaMode === 1 ) {
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+ var lineHeight = $.data(this, 'mousewheel-line-height');
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+ delta *= lineHeight;
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+ deltaY *= lineHeight;
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+ deltaX *= lineHeight;
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+ } else if ( orgEvent.deltaMode === 2 ) {
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+ var pageHeight = $.data(this, 'mousewheel-page-height');
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+ delta *= pageHeight;
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+ deltaY *= pageHeight;
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+ deltaX *= pageHeight;
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+ }
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+
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+ // Store lowest absolute delta to normalize the delta values
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+ absDelta = Math.max( Math.abs(deltaY), Math.abs(deltaX) );
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+
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+ if ( !lowestDelta || absDelta < lowestDelta ) {
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+ lowestDelta = absDelta;
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+
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+ // Adjust older deltas if necessary
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+ if ( shouldAdjustOldDeltas(orgEvent, absDelta) ) {
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+ lowestDelta /= 40;
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+ }
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+ }
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+
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+ // Adjust older deltas if necessary
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+ if ( shouldAdjustOldDeltas(orgEvent, absDelta) ) {
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+ // Divide all the things by 40!
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+ delta /= 40;
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+ deltaX /= 40;
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+ deltaY /= 40;
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+ }
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+
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+ // Get a whole, normalized value for the deltas
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+ delta = Math[ delta >= 1 ? 'floor' : 'ceil' ](delta / lowestDelta);
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+ deltaX = Math[ deltaX >= 1 ? 'floor' : 'ceil' ](deltaX / lowestDelta);
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+ deltaY = Math[ deltaY >= 1 ? 'floor' : 'ceil' ](deltaY / lowestDelta);
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+
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+ // Normalise offsetX and offsetY properties
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+ if ( special.settings.normalizeOffset && this.getBoundingClientRect ) {
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+ var boundingRect = this.getBoundingClientRect();
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+ offsetX = event.clientX - boundingRect.left;
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+ offsetY = event.clientY - boundingRect.top;
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+ }
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+
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+ // Add information to the event object
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+ event.deltaX = deltaX;
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+ event.deltaY = deltaY;
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+ event.deltaFactor = lowestDelta;
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+ event.offsetX = offsetX;
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+ event.offsetY = offsetY;
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+ // Go ahead and set deltaMode to 0 since we converted to pixels
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+ // Although this is a little odd since we overwrite the deltaX/Y
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+ // properties with normalized deltas.
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+ event.deltaMode = 0;
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+
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+ // Add event and delta to the front of the arguments
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+ args.unshift(event, delta, deltaX, deltaY);
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+
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+ // Clearout lowestDelta after sometime to better
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+ // handle multiple device types that give different
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+ // a different lowestDelta
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+ // Ex: trackpad = 3 and mouse wheel = 120
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+ if (nullLowestDeltaTimeout) { clearTimeout(nullLowestDeltaTimeout); }
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+ nullLowestDeltaTimeout = setTimeout(nullLowestDelta, 200);
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+
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+ return ($.event.dispatch || $.event.handle).apply(this, args);
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+ }
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+
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+ function nullLowestDelta() {
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+ lowestDelta = null;
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+ }
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+
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+ function shouldAdjustOldDeltas(orgEvent, absDelta) {
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+ // If this is an older event and the delta is divisable by 120,
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+ // then we are assuming that the browser is treating this as an
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+ // older mouse wheel event and that we should divide the deltas
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+ // by 40 to try and get a more usable deltaFactor.
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+ // Side note, this actually impacts the reported scroll distance
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+ // in older browsers and can cause scrolling to be slower than native.
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+ // Turn this off by setting $.event.special.mousewheel.settings.adjustOldDeltas to false.
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+ return special.settings.adjustOldDeltas && orgEvent.type === 'mousewheel' && absDelta % 120 === 0;
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+ }
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+
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+}));
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